package south;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;


/**
 * 开发公司：itboy.net<br/>
 * 版权：itboy.net<br/>
 * <p>
 * 静态获取Bean
 * <p>
 * 区分 责任人 日期 说明<br/>
 * 创建 周柏成 2016年4月4日 <br/>
 * <p>
 * *******
 * <p>
 * @author zhou-baicheng
 * @email i@itboy.net
 * @version 1.0,2016年4月4日 <br/>
 */
public class SpringContextUtil implements ApplicationContextAware {

    private static ApplicationContext applicationContext;
    private static final Logger LOG = LoggerFactory.getLogger(SpringContextUtil.class);

    // 实现
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringContextUtil.applicationContext = applicationContext;
    }

    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public static Object getBean(String name) throws BeansException {
        try {
            return applicationContext.getBean(name);
        } catch(Exception e) {
            LOG.error("获取的Bean不存在！", e);
            throw new RuntimeException("获取的Bean不存在！");
        }
    }

    public static <T> T getBean(String name, Class<T> requiredType) throws BeansException {
        return applicationContext.getBean(name, requiredType);
    }

    public static boolean containsBean(String name) {
        return applicationContext.containsBean(name);
    }

    public static boolean isSingleton(String name) throws NoSuchBeanDefinitionException {
        return applicationContext.isSingleton(name);
    }

    public static Class<? extends Object> getType(String name)
            throws NoSuchBeanDefinitionException {
        return applicationContext.getType(name);
    }

    public static String[] getAliases(String name) throws NoSuchBeanDefinitionException {
        return applicationContext.getAliases(name);
    }

}